Re-emission prevention structure
By using the coupling of the barrier part and the guide rib in the preventing re-emission structure of the blood collection needle, the axial and circumferential rotation of the inner sleeve is achieved, and the problem of excessive size of the blood collection needle in the prior art is solved, and a smaller volume is achieved and better carry convenience.
Patent Information
- Application Number
- CN202420240492.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-01
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-02-01
AI Technical Summary
The existing re-emission prevention structure requires space due to the operation of the elastic wall, which makes the overall size of the blood collection needle larger and difficult to carry.
A re-emitting prevention structure including an outer jacket and an inner sleeve is designed. By providing a first and second barrier portion, a guide surface and a guide rib, the shaft of the inner sleeve is realized by the coupling of the barrier fitting portion and the guide rib. Rotate in and around the circumference to avoid re-ejection.
It effectively reduces the diameter of the blood collection needle, reduces its volume, is easy to carry, and ensures the safety and reliability of the blood collection needle.
Smart Images
Figure CN222172127U_ABST
Abstract
Description
Technical Field
[0001] Embodiments of the present disclosure relate to the field of medical devices, and more particularly to a structure for preventing re-emission. Background Art
[0002] The existing anti-re-ejection structure is provided with triangular ribs on the outer sleeve and elastic walls on the inner sleeve. When the blood collection needle is pressed to fire, the elastic wall crosses the triangular ribs. After the firing is completed, the elastic wall presses against the triangular ribs so that the inner sleeve can no longer be reset. Since a certain space is required for the elastic wall to move, the overall size of the blood collection needle is large. Utility Model Content
[0003] In order to alleviate or solve at least one aspect or at least one point of the above problems, the present disclosure provides a structure for preventing re-emission, which can reduce the diameter of the blood collection needle, reduce the volume of the blood collection needle, and facilitate carrying.
[0004] According to the present disclosure, a structure for preventing re-emission is provided, comprising:
[0005] a jacket having an opening at one end thereof; and
[0006] An inner sleeve, one end of which is located outside the opening, and the other end of which enters the outer sleeve from the opening.
[0007] The inner wall of the outer sleeve is provided with a first blocking portion, and the other end of the inner sleeve is provided with a blocking fitting portion protruding radially outward. Based on the axial and circumferential rotational movement of the inner sleeve toward the other end of the outer sleeve, the first blocking portion is suitable for abutting against the blocking fitting portion to prevent the inner sleeve from moving toward one end of the outer sleeve.
[0008] Optionally, a second blocking portion protruding radially inward is further provided on the inner wall of the outer sleeve, and the second blocking portion is closer to one end of the outer sleeve than the first blocking portion;
[0009] At the installation position of the outer sleeve and the inner sleeve, the second blocking portion is suitable for abutting against the blocking matching portion.
[0010] Optionally, a first guide surface is provided on the inner wall of the outer sleeve, and a guide rib is provided on the outer wall of the inner sleeve;
[0011] The guide rib is suitable for sliding along the first guide surface so that the inner sleeve rotates in the circumferential direction.
[0012] Optionally, a second guide surface is further provided on the inner wall of the outer sleeve, and the blocking fitting portion is suitable for sliding along the second guide surface.
[0013] Optionally, the end of the first guide surface has a first blocking surface, and the guide rib abuts against the first blocking surface after sliding along the first guide surface to stop further axial movement.
[0014] Optionally, the end of the second guide surface has a first blocking portion;
[0015] Based on the axial and circumferential rotational movement of the guide rib on the first guide surface, the blocking fitting portion slides along the second guide surface until the blocking fitting portion is engaged with the first blocking portion.
[0016] Optionally, the first guide surface and the second guide surface are respectively two surfaces of the same oblique rib portion arranged on the inner wall of the outer sleeve.
[0017] Optionally, the first blocking portion and the first blocking surface are different planes of the same transverse rib portion which protrudes radially inward and is arranged on the inner wall of the outer sleeve.
[0018] Optionally, a protrusion structure protruding radially inward is provided on the inner wall of the outer sleeve;
[0019] The protruding structure includes the oblique rib portion and the transverse rib portion, and the oblique rib portion and the transverse rib portion are integrally formed.
[0020] Optionally, the guide rib is a vertical guide rib, and the vertical guide rib is spaced apart from the blocking matching portion in both the circumferential direction and the axial direction to form a gap;
[0021] During the axial and circumferential rotational movement of the inner sleeve toward the other end of the outer sleeve, the oblique rib portion passes through the gap. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 and Figure 2 Schematic diagram of the internal structure of a jacket at different angles according to an embodiment of the utility model;
[0023] Figure 3 This is a schematic structural diagram of an inner sleeve of an embodiment of the utility model;
[0024] Figure 4 for Figure 3 A partial enlarged view of the inner sleeve in the middle dotted line portion;
[0025] Figure 5 It is a schematic diagram of the cooperation of the inner sleeve and the outer sleeve at one angle when the utility model is in the initial installation position;
[0026] Figure 6 This is a schematic diagram of the cooperation of the inner sleeve and the outer sleeve at another angle when the utility model is in the initial installation position;
[0027] Figure 7 It is a partial structural schematic diagram of the inner sleeve of the utility model after being pressed and matched with the outer sleeve;
[0028] Figure 8 is a schematic diagram of the internal structure of a jacket according to another embodiment of the utility model;
[0029] Fig. 9 is a schematic diagram of the internal structure of an inner sleeve according to another embodiment of the utility model;
[0030] Figures 10 to 12 is a schematic diagram of the structure of the anti-re-emission structure according to the utility model in different states, wherein: Fig.10 is the initial assembly state, Fig.11 It is the state of being ready to fire after the needle cap is removed. Fig.12 This is the state of the blood collection needle after it is fired.
[0031] In the figure:
[0032] 10. Jacket;
[0033] 11. second blocking portion, 12. first guide surface, 13. first blocking surface, 14. second guide surface, 15. first blocking portion;
[0034] 20. Inner sleeve;
[0035] 21. blocking mating portion, 211. mating top surface, 22. guide ribs, 221. guide wires. DETAILED DESCRIPTION
[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field based on this application belong to the scope of protection of the utility model.
[0037] According to an exemplary embodiment of the present invention, Figure 5 As shown, a re-emission prevention structure includes an outer sleeve 10, one end of which is provided with an opening; and an inner sleeve 20, one end of which is located outside the opening, and the other end of the inner sleeve 20 enters the outer sleeve 10 from the opening.
[0038] like Figure 1 and Figure 2 As shown, the inner wall of the outer shell 10 has a first blocking portion 15;
[0039] like Figure 3 As shown, the other end of the inner sleeve 20 has a blocking fitting portion 21 protruding radially outward; Figure 7 As shown, based on the axial and circumferential rotational movement of the inner sleeve 20 toward the other end of the outer sleeve 10 , the first blocking portion 15 is adapted to abut against the blocking fitting portion 21 to prevent the inner sleeve 20 from moving toward one end of the outer sleeve 10 .
[0040] The “upper”, “lower”, “one end”, “the other end”, “inside” and “outside” mentioned in the present disclosure are schematic descriptions. In the present disclosure, the direction of the outer sleeve opening or the direction in which the needle is inserted is “upper” or “one end”, and the opposite direction of the outer sleeve opening or the direction in which the needle is inserted is “lower” or “the other end”; the direction toward the central axis is “inside”, and the opposite direction toward the central axis is “outside”.
[0041] According to the present disclosure, a re-emission prevention structure is provided, which can reduce the diameter of a blood collection needle, reduce the volume of the blood collection needle, and facilitate carrying.
[0042] In an optional embodiment, the blocking fitting portion 21 is a radially outward protrusion structure or a hook-shaped structure provided on the inner sleeve 20. As long as it can abut and fit with the first blocking portion 15, it is within the structural protection scope of the blocking fitting portion 21 disclosed in the present invention.
[0043] Optional, such as Figure 4 As shown, the top of the blocking and matching portion 21 has a matching top surface 211 , and the matching top surface 211 is suitable for abutting and matching with the first blocking portion 15 .
[0044] In an optional embodiment, the first blocking portion 15 is a rib disposed on the inner wall of the outer sleeve 10 , and the surface of the rib may be a plane or an inclined surface, or other structural components that can abut against the blocking mating portion 21 .
[0045] like Figure 1 and Figure 2 As shown, in an optional embodiment, a second blocking portion 11 protruding radially inward is further provided on the inner wall of the outer sleeve 10, and the second blocking portion 11 is closer to one end of the outer sleeve 10 than the first blocking portion 15, that is, the second blocking portion 11 is closer to the opening end of the outer sleeve 10. In the installation position of the outer sleeve 10 and the inner sleeve 20, the second blocking portion 11 is suitable for abutting against the blocking matching portion 21. Figure 5 As shown, the matching structure of the second blocking portion 11 abutting against the blocking matching portion 21 in the initial installation position is shown.
[0046] In an optional embodiment, the second blocking portion 11 is a triangular rib, a horizontal rib or a vertical rib structure, such as Figure 1 or Figure 2 As shown, the second blocking portion 11 is a horizontal rib; Figure 8 As shown, the second blocking portion 11 is a vertical rib.
[0047] After assembly and in the ready-to-fire state, the blocking matching portion 21 is hooked on the second blocking portion 11 of the outer sleeve, so that the blocking matching portion 21 is abutted and matched with the second blocking portion 11 .
[0048] like Figure 1 and Figure 2 As shown, a first guide surface 12 is provided on the inner wall of the outer sleeve 10; Figure 3 As shown, guide ribs 22 are provided on the outer wall of the inner sleeve 20;
[0049] The guide rib 22 is suitable for sliding along the first guide surface 12 to enable the inner sleeve 20 to rotate in the circumferential direction.
[0050] like Figure 6 , which is a schematic structural diagram of the guide rib 22 sliding along the first guide surface 12 .
[0051] According to an embodiment of the present disclosure, the first guide surface 12 is a surface of an oblique rib portion 10A disposed on the inner wall of the outer sleeve 10 , and the surface of the oblique rib portion 10A is an inclined surface or a curved surface. Correspondingly, the first guide surface 12 is an inclined surface or an arc-shaped surface.
[0052] A first blocking surface 13 is provided at the end of the first guide surface 12 . The guide rib 22 slides along the first guide surface 12 and then abuts against the first blocking surface 13 , so that the guide rib 22 stops further axial movement.
[0053] Optionally, the first blocking surface 13 is a platform disposed on the inner wall of the outer sleeve 10, which can prevent the guide rib 22 from further axial movement. When the guide rib 22 moves to the first blocking surface 13, the inner sleeve 20 also stops circumferential rotation.
[0054] Optionally, the first blocking surface 13 is the upper surface of a transverse rib portion that protrudes radially inward and is arranged on the inner wall of the outer sleeve 10. The first blocking surface 13 is a horizontal surface that is perpendicular to the axial direction of the blood collection needle.
[0055] In an optional embodiment, if Figure 1 and Figure 2 As shown, a second guide surface 14 is also provided on the inner wall of the outer sleeve 10, and the blocking matching portion 21 is suitable for sliding along the second guide surface 14. When the inner sleeve 20 is pressed by mistake, the inner sleeve 20 moves downward, and the blocking matching portion 21 slides a certain distance along the second guide surface 14. Since it is not pressed to the bottom, after the false triggering operation is released, the blocking matching portion 21 will slide upward along the second guide surface 14, so that the inner sleeve 20 returns to the unpressed state. Only when a certain pressure is applied to the inner sleeve 20, the blocking matching portion 21 slides along the second guide surface 14 until the guide rib 22 moves to the first blocking surface 13, at which time the blocking matching portion 21 abuts against the first blocking portion 15.
[0056] like Figure 7 , which is a schematic diagram showing that the blocking matching portion 21 abuts against the first blocking portion 15 after sliding along the second guide surface 14 .
[0057] The first blocking portion 15 is located at an end of the second guide surface 14 .
[0058] In an optional embodiment, the first blocking portion 15 is a stepped surface intersecting the second guide surface 14. Based on the axial and circumferential rotational movement of the guide rib 22 on the first guide surface 12, the blocking matching portion 21 slides along the second guide surface 14 until the blocking matching portion 21 is engaged with the first blocking portion 15.
[0059] like Figure 1 and Figure 2 As shown, in an optional embodiment, the first guide surface 12 and the second guide surface 14 are respectively two surfaces of the same oblique rib portion 10A provided on the inner wall of the outer sleeve 10 .
[0060] The oblique rib portion 10A is an oblique rib protruding radially inwardly on the inner wall of the outer sleeve 10. The upper and lower surfaces of the oblique rib portion 10A are inclined surfaces or curved surfaces. Correspondingly, the first guide surface 12 and the second guide surface 14 are inclined surfaces or arc-shaped surfaces.
[0061] like Figure 1 As shown, in an optional embodiment, a protruding structure protruding radially inward is provided on the inner wall of the outer sleeve 10, and the protruding structure includes an oblique rib portion 10A and a transverse rib portion 10B. The oblique rib portion 10A and the transverse rib portion 10B are integrally formed, and the oblique rib portion 10A and the transverse rib portion 10B are approximately "L"-shaped structures.
[0062] Optionally, the first blocking portion 15 and the first blocking surface 13 are different planes of the same transverse rib portion 10B that protrudes radially inward and is arranged on the inner wall of the outer sleeve 10 .
[0063] Optional, such as Figure 2 and Figure 7 As shown, a right-angle step is formed between the end of the second guide surface 14 and the bottom surface of the transverse rib portion 10B, and the upper surface of the right-angle step is the first blocking portion 15 .
[0064] In an optional embodiment, if Figure 3 As shown, the guide rib 22 is a guide vertical rib. Figure 4 As described above, the bottom guide line 221 of the guide rib 22 contacts the first guide surface 12 and slides along the first guide surface 12 .
[0065] Optionally, the guide vertical ribs are independently arranged on the wall surface of the inner sleeve 20 where the blocking matching part 21 is located. That is, the guide vertical ribs are independent rib positions arranged on the inner sleeve 20, and have a certain distance from the wall surface where the blocking matching part 21 is located. Optionally, the wall surface where the blocking matching part 21 is located and the guide vertical ribs are an integrated structure.
[0066] like Fig. 9 As shown, another form of the guide rib 22 is shown, and the guide rib 22 is a protrusion arranged on the outer wall of the inner sleeve 20 in the axial direction.
[0067] In an optional embodiment, the guide rib 22 is a guide vertical rib, and the guide vertical rib is spaced apart from the blocking matching portion 21 in both the circumferential direction and the axial direction to form a gap;
[0068] During the axial and circumferential rotation of the inner sleeve 20 toward the other end of the outer sleeve 10 , the oblique rib portion 10A passes through the gap. Figures 10 to 12 The structure diagram of the blood collection needle using the anti-re-emission structure of the utility model in different states, wherein: Fig.10 is the initial assembly state, Fig.11 It is the state of being ready to fire after the needle cap is removed. Fig.12 This is the state of the blood collection needle after it is fired.
[0069] According to the re-emission prevention structure of the present disclosure, Fig.10 As shown, in the initial installation state, the blocking matching portion 21 of the inner sleeve 20 is in contact with the second blocking portion 11 of the outer sleeve 10, and the guide rib 22 is located on the upper part of the first guide surface 12. Fig.11 As shown, after the needle cap is removed, the blood collection needle moves a certain distance toward the emission direction. At this time, the blocking matching portion 21 of the inner sleeve 20 is still in abutment with the second blocking portion 11 of the outer sleeve 10 .
[0070] like Fig.12 As shown, combined Figure 1 , Figure 3 and Figure 5 When the inner sleeve 20 is pressed downward, the blocking matching portion 21 of the inner sleeve 20 is disengaged from the matching with the second blocking portion 11 . After being pressed to the bottom, the blocking matching portion 21 is abutted and matched with the first blocking portion 15 .
[0071] During the downward movement, the blocking fitting 21 moves along the second guide surface 14, and the guide ribs 22 on the inner sleeve 20 slide along the first guide surface 12, so that the inner sleeve 20 moves in the axial direction and rotates in the circumferential direction. The guide ribs 22 stop moving after reaching the first blocking surface 13, at which time the inner sleeve 20 cannot continue to move downward. The blood collection needle is inserted in the insertion direction based on the elastic force of the spring. After the insertion is completed, the blood collection needle is retracted into the space formed by the outer sleeve 10 and the inner sleeve 20 based on the elastic force of the spring.
[0072] After the inner sleeve 20 is pressed down to the bottom, the blocking matching portion 21 abuts against the first blocking portion 15, so that the first blocking portion 15 prevents the inner sleeve 20 from moving in the direction of the needle piercing, which has the effect of preventing secondary emission.
[0073] At the same time, since in the present disclosure, the first blocking portion 15 is a stepped surface of a rib portion arranged on the inner wall of the outer sleeve 10, and the blocking matching portion 21 is a protrusion arranged on the inner sleeve 10, and no elastic arm is provided separately, the diameter of the blood collection needle can be reduced, thereby reducing the volume of the blood collection needle and facilitating carrying.
[0074] It should be noted that the above technical solutions can be arbitrarily combined under logical circumstances, all within the scope of protection of the utility model. In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements that are not clearly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.
[0075] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.
[0076] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes and combinations of elements may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A structure for preventing re-emission, comprising: A jacket, wherein one end of the jacket is provided with an opening; and An inner sleeve, one end of which is located outside the opening, and the other end of which enters the outer sleeve from the opening. Features: The inner wall of the outer sleeve is provided with a first blocking portion, and the other end of the inner sleeve is provided with a blocking fitting portion protruding radially outward. Based on the axial and circumferential rotational movement of the inner sleeve toward the other end of the outer sleeve, the first blocking portion is suitable for abutting against the blocking fitting portion to prevent the inner sleeve from moving toward one end of the outer sleeve.
2. The anti-re-emission structure according to claim 1, characterized in that: A second blocking portion protruding radially inward is also provided on the inner wall of the outer sleeve, and the second blocking portion is closer to one end of the outer sleeve than the first blocking portion; At the installation position of the outer sleeve and the inner sleeve, the second blocking portion is suitable for abutting against the blocking matching portion.
3. The anti-re-emission structure according to claim 1, characterized in that: A first guide surface is provided on the inner wall of the outer sleeve, and a guide rib is provided on the outer wall of the inner sleeve; The guide rib is suitable for sliding along the first guide surface so that the inner sleeve rotates in the circumferential direction.
4. The anti-re-emission structure according to claim 3, characterized in that: A second guide surface is also provided on the inner wall of the outer sleeve, and the blocking fitting portion is suitable for sliding along the second guide surface.
5. The structure for preventing re-emission according to claim 4, characterized in that: The end of the first guide surface has a first blocking surface, and the guide rib abuts against the first blocking surface after sliding along the first guide surface to stop further axial movement.
6. The structure for preventing re-emission according to claim 4, characterized in that: The end of the second guide surface has a first blocking portion; Based on the axial and circumferential rotational movement of the guide rib on the first guide surface, the blocking fitting portion slides along the second guide surface until the blocking fitting portion is engaged with the first blocking portion.
7. The structure for preventing re-emission according to claim 5, characterized in that: The first guide surface and the second guide surface are respectively two surfaces of the same oblique rib portion arranged on the inner wall of the outer sleeve.
8. The structure for preventing re-emission according to claim 7, characterized in that: The first blocking portion and the first blocking surface are different planes of the same transverse rib portion which is arranged on the inner wall of the outer sleeve and protrudes radially inward.
9. The structure for preventing re-emission according to claim 8, characterized in that: A protrusion structure protruding radially inward is provided on the inner wall of the outer sleeve; The protruding structure includes the oblique rib portion and the transverse rib portion, and the oblique rib portion and the transverse rib portion are integrally formed.
10. The structure for preventing re-emission according to claim 7, characterized in that: The guide rib is a vertical guide rib, and the vertical guide rib is spaced apart from the blocking matching portion in both the circumferential direction and the axial direction to form a gap; During the axial and circumferential rotational movement of the inner sleeve toward the other end of the outer sleeve, the oblique rib portion passes through the gap.